JP2003163607A - Radio equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio equipment with excellent power efficiency with respect to the radio equipment which transmits a plurality of transmission signals by using a plurality of radio frequency transmission channels, and to provide an economical radio system having excellent power efficiency capable of effectively utilizing frequencies by using the radio equipment, and a transmission power control method. <P>SOLUTION: In the radio equipment which transmits a plurality of transmission signals by using a plurality of radio frequency transmission channels, a power value of the transmission signal of the transmission channel and the power value leaking to an adjacent channel are measured by a measuring means, the measured result and a desired value are compared and a supply voltage of an amplification means and input signals are controlled by a control means corresponding to the compared result. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention controls a signal power of a transmission frequency channel and an adjacent frequency channel leak power which is an interference amount to an adjacent frequency channel to respective set values, and operates with optimum power efficiency. And a transmission power control method in a wireless device.

[0002]

2. Description of the Related Art In a wireless device such as a mobile phone, a wireless device used in the wireless communication system is used from the viewpoint of long-term use and temperature rise in the device during use, and in the wireless communication system from the viewpoint of effective frequency utilization and economical efficiency. The device has good power efficiency when outputting the signal power of the transmission frequency channel set in the wireless communication system (hereinafter referred to as transmission channel output power), and the power leaking to the adjacent frequency channel (hereinafter referred to as adjacent channel leakage). It is desired that the electric power) satisfies the electric power value set in the wireless communication system and operates in a state as close as possible to the electric power value. That is, it is desirable that the wireless device ideally has the transmission channel output power, the adjacent channel leakage power, and the power efficiency set optimally.
The transmission channel output power, adjacent channel leakage power,
Prior art regarding power efficiency is described.

In a radio device, a signal to be transmitted (hereinafter referred to as a transmission baseband signal) is transmitted from the antenna as a transmission signal from the radio device in a transmission channel by modulating a radio carrier wave allocated for signal transmission. At this time, a digital radio device such as a mobile phone uses a modulation system such as π / 4QPSK as a transmission signal modulation system, but when the transmission unit of the radio device does not have a linear characteristic, it is called adjacent channel interference. Interference occurs in the adjacent channel assigned to another signal transmission and is transmitted as a transmission signal in a form of being superimposed on the transmission channel signal. This interference is mainly due to the non-linear characteristic of the power amplifier of the transmitter.

In the wireless communication system, the amount of leakage to the adjacent channel is determined as a standard by the ratio of the output power of the transmission channel and the leakage power of the adjacent channel in order to ensure normal communication. That is, the adjacent channel power ACLR is the ratio of the adjacent channel leakage power relative to the transmission channel output power (hereinafter ACLR (A djacent
C hannel L eakage Power R a
(tio))). A concrete example of ACLR is a digital car telephone system standard R
CR STD-27 or IMT-2000 DS
-CDMA SYSTEM ARIB STD-T63
Stipulated in. In a wireless communication system, by complying with these standards, normal communication can be performed on a plurality of transmission / reception channels.

Regarding the power efficiency and the adjacent channel leakage power of the wireless device, for example, the relationship between the output power and the power efficiency disclosed in FIG. 8 of JP-A-7-170202 and JP-A-9-153.
As can be seen from the relationship between the input / output characteristics and adjacent channel leakage power disclosed in FIGS. 37 (a) and (b) of 849, when the power efficiency becomes good, the adjacent channel leakage power increases due to the increase in distortion of the power amplifier. There is a relationship to

A method for suppressing the adjacent channel leakage power generated in the power amplifier of the transmission unit of the wireless device is disclosed in Japanese Patent Laid-Open No. 6-206 / 1994.
77876, JP2000-59849A, JP2000
-4173. Japanese Unexamined Patent Publication No. 6-77876 discloses a linear transmission power amplifier circuit by detecting an increment of adjacent channel leakage power using a receiver circuit of a TDMA wireless device and controlling the bias of the transmitter power amplifier circuit based on the detection signal. The performance is compensated. This disclosure is a method of determining that the linear performance of the power amplification circuit is deteriorated when the adjacent channel leakage power is increased from the initial value and compensating the linear performance of the amplifier so as not to cause the nonlinear distortion of the power amplification circuit.

Japanese Unexamined Patent Publication No. 2000-59849 discloses a method of bringing a transmitter closer to a linear operation in order to reduce the amount of adjacent channel interference, and a configuration of using a transmitter having different maximum values of adjacent channel interference in a wireless system. Has been done. Further, in Japanese Patent Laid-Open No. 2000-4173, the distortion amount of the transmission signal is obtained from the peak value and the average value of the detection voltage obtained by envelope detection of the transmission signal, and this distortion amount is centered around a preset specified value. There is disclosed a technique in which the current of the power amplifier is increased / decreased to fall within a predetermined range depending on whether or not it is within the predetermined range.

[0008]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
According to the disclosure of Japanese Patent No. 7876, 2000-59849, since the amount of adjacent channel interference is reduced by operating the power amplifier in the linear region or a region close to the linear region, the power efficiency of the power amplifier is poor and, as a result, the mobile phone. However, such wireless devices have a problem that the built-in battery is consumed quickly and the usage time is shortened. Further, there is no description as to whether the output power of the transmission channel satisfies the standard of the device, and no consideration is given to the correspondence to the standard defined by the wireless communication system.

Further, the above-mentioned Japanese Patent Laid-Open No. 2000-4173 discloses controlling the distortion amount so as to be within a predetermined value centered on a preset specified value. This is an indirect method, in which the detected voltage ratio is used as the amount of distortion of the transmitted signal, rather than measurement, and the accuracy is poor, and the margin is set and adjusted to a larger extent to the adjacent channel leakage power standard. In addition, the transmission output of the power amplifier naturally changes from the relationship of controlling the current of the power amplifier for distortion amount control, and there is no guarantee that it operates with the optimum power efficiency and the transmission output power specified in the standard. There's a problem.

Further, the above-mentioned Japanese Patent Laid-Open No. 2000-59849.
When multiple wireless communication systems are used mixedly, the transmitter at the system end requires a tighter adjacent channel leakage power value than the transmitter at the center of the system. Therefore, there is a problem in that an economical system cannot be constructed because the power efficiency is poor and the operation state is close to a linear operation in order to reduce the power consumption. Further, as in the above disclosed example, no consideration is given to the correspondence of the transmission output power to the system standard.

The present invention has been made in order to solve the above problems, and provides a radio device having good power efficiency and good power efficiency that enables effective frequency use by using the radio device. The present invention provides an economical wireless system and a transmission power control method.

[0012]

In order to achieve the above object, the present invention measures a transmission power value and an adjacent channel leakage power value of a transmission signal of a predetermined radio frequency transmission channel, and an amplification means according to the measurement result. Is controlled by the control means. More specifically, it is achieved by calculating the ACLR value of the ratio between the transmission power value and the leakage power value and controlling the amplifying means according to the calculation result.

Further, the control means is configured to calculate the calculated ACLR.
Control the amplifier so that R is within the tolerance of the desired ACLR or the difference between the calculated ACLR and the desired ACLR is reduced. Further, the control means repeatedly carries out adjustment of the voltage supplied to the power amplification means and the gain of the level variable means (corresponding to the variable gain amplifier of the embodiment of the invention).

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to Examples. FIG. 1 is a block diagram showing the configuration of a digital mobile phone of an embodiment to which the present invention is applied. The digital mobile phone includes an antenna, a duplexer, a transmitter, a receiver, and a controller. The reception unit 20 receives the reception signal from the antenna 1 via the duplexer 2 that separates the transmission / reception signal, and outputs it to the control unit 21 as a reception baseband signal.

The transmitter 19 modulates the first local signal from the first local oscillator 11 with the transmission baseband signal from the controller 21 to generate a signal of the first intermediate frequency, and the modulator 9. Bandpass filter 8 for removing unnecessary wave components from the signal of the first intermediate frequency output from 9
And a second local signal from the first local frequency from the second local oscillator 10 and a signal of the first intermediate frequency from which the unnecessary wave component has been removed. A frequency converter 7 for converting into a radio frequency transmission signal having a frequency higher by the frequency is provided. Furthermore, a bandpass filter 6 that removes unnecessary wave components from the transmission signal output from the frequency converter 7, a variable gain amplifier 5 that linearly amplifies the transmission signal from which unnecessary wave components have been removed,
A power amplifier 4 that amplifies the transmission signal linearly amplified by the variable gain amplifier 5 to the output power of the transmission signal specified by the wireless device; and a coupler 3 that branches a part of the transmission signal amplified by the power amplifier 4. It is equipped with.

The transmission signal that has passed through the coupler 3 is transmitted as a transmission signal from the antenna 1 via the duplexer 2. The transmitting unit 19 further includes an attenuator 13 that adjusts the signal level of the transmission signal branched by the coupler 3, and an attenuator 13
A frequency converter 14 for converting a level of the transmission signal adjusted by the attenuation amount of the transmission signal and a third local signal from the third local oscillator 18 into a signal of a second intermediate frequency lower than the transmission signal, and a frequency converter. A band-pass filter 15 that removes unnecessary wave components from the signal of the second intermediate frequency obtained by 14, an amplifier 16 that amplifies the signal of the second intermediate frequency that has passed through the band-pass filter 15, and an amplifier 16 that amplifies A / D converter 17 for obtaining a digital output for measuring the power of the second intermediate frequency signal
And.

The control unit 21 calculates the power of the transmission signal from the digital output of the A / D converter 17 and the attenuation of the attenuator 13, and the memory unit 24 that stores the calculated power value. And a RAM 22 for storing power standards and the like
And a transmission power control signal for controlling the voltage generation source 12 that supplies the power supply voltage and the bias voltage of the power amplifier 4 and the gain of the variable gain amplifier 5 based on the comparison result of the calculated power value and the standard. Gain control signal to control and attenuator 1
A monitoring control unit 25 that outputs an attenuation amount control signal that controls the attenuation amount of No. 3 and a local frequency control signal that controls the third local signal frequency of the third local oscillator 18.
An external terminal 26 for rewriting the contents of the information stored in the RAM 22 from the outside, an input / output unit (not shown) for voice, data, etc., a power supply unit for supplying power to the wireless device,
It is equipped with.

Although the power amplifier 4 and the variable gain amplifier 5 are described separately in FIG. 1, the variable gain amplifier 5 may be built in the power amplifier 4, or they may be integrated as an amplifying means. good. In addition, the memory unit 24 and the RAM 22 may be integrally configured as a storage unit in the control unit. The RAM 22 has a function of rewriting the stored information by an information signal sent from the external terminal 26 or from the wireless communication partner station.

Further, the voltage generation source 12 for supplying the power supply voltage and the bias voltage to the power amplifier 4 is shown in FIG.
However, it may be installed in the control unit 21. The monitoring control unit 25 of the control unit 21 also has a function of periodically performing the above-described series of operations in order to always keep the transmission device in the optimum state. Needless to say, the CPU of the supervisory control unit performs various controls from the supervisory control unit 25.

Further, FIG. 1 shows one transmitting unit and one receiving unit for the sake of simplicity. This corresponds to, for example, the configuration of a mobile phone, but in the case of a configuration of a base station or the like, it has a configuration including a plurality of transmitting units and multiple receiving units. In this case, signals having different frequencies from the couplers of the plurality of transmitters are combined and output from the antenna. In addition, a signal including a plurality of frequency signals is received from the antenna, and the distributed signals are received by each receiving unit, and a desired frequency channel is extracted.

Next, of the operation of the present invention, the procedure of measuring the transmission channel output power and the adjacent channel leakage power and calculating the ACLR value will be described in more detail with reference to FIGS. 2 to 4. FIG. 2 is a diagram of a spectrum of a transmission signal branched by the coupler 3 and input to the attenuator 13 and a third local oscillation frequency. Figure 3
3 is a spectrum diagram of a transmission channel signal input to the A / D converter 17. FIG.

FIG. 4 is a spectrum diagram of the adjacent channel leakage signal input to the A / D converter 17. The vertical axis of the figure is the spectrum intensity and the horizontal axis is the frequency. Now, the transmission signal branched by the coupler 3 at the output of the transmitter 19 is
The frequency converter 14 is passed through the attenuator 13 whose attenuation amount is adjusted by the control signal from the monitoring control unit 25 of the control unit 21.
At a second intermediate frequency lower than the frequency of the transmission signal mixed with the third local signal of the third local oscillator 18 and having a frequency component of the difference between the frequency of the transmission signal and the third local oscillation frequency. Is output from the frequency converter 14. Where the third local oscillator 1
The oscillating frequency of 8 is made different between the time of frequency conversion of the transmission channel signal of the transmission signal described by the solid line in FIG. 2 and the time of frequency conversion of the adjacent channel leakage signal of the transmission signal (shown in FIG. 2), and the same. The monitor control unit 25 of the control unit 21 controls so that the signal of the second intermediate frequency is output.

More specifically, the transmission channel signal is F,
The signal bandwidth of the transmission channel signal and the adjacent channel signal is
B, the frequency interval between the transmission channel signal and the adjacent channel signal is ΔF, the second intermediate frequency is f, and the second intermediate frequency is a frequency that can be detected by the A / D converter 17, and the relationship F> f. It is in. The values of F, f, ΔB, and ΔF are, for example, in the case of a digital mobile phone, F is a frequency of 900 MHz band, f is a frequency of several MHz band, ΔB is 21 KHz, and ΔF is
It is 50 KHz.

The transmission channel signal F has a third local oscillation frequency of the third local oscillator 18 of F + f (when the third local frequency is higher than that of the transmission channel signal, that is, in the case of Upper Local), or F-f ( The third local frequency is lower than the transmission channel signal, that is, in the case of Lower Local (not shown))
By setting to, the frequency converter 14 performs frequency conversion to the second intermediate frequency f and outputs.

The signal leaking to the adjacent channel is generated in F ± ΔF on both the left and right sides of the transmission channel signal, and the left and right generation amounts are slightly different, so that it is necessary to measure both frequency regions and measure the larger generation amount. Become. Here, for the sake of convenience, the same generation amount is assumed and F + ΔF, which is a frequency higher than the transmission channel signal, is described. By setting the third local oscillation frequency of the third local oscillator to F + f + ΔF, the adjacent channel signals in the frequency converter 14 are adjacent to each other at the second intermediate frequency f '(f' = f). In order to distinguish the second intermediate frequency corresponding to the channel signal from the second intermediate frequency f corresponding to the transmission channel signal, f '
Is output).

The second intermediate frequency signal f'output from the frequency converter 14 passes through the band pass filter 15 having the pass band width ΔB to be converted into the transmission channel signal shown by the solid line in FIG. Corresponding second intermediate frequency f
It is possible to correctly compare the power of the signal of the above signal and the power of the signal of the second intermediate frequency f'corresponding to the adjacent channel signal shown by the solid line in FIG. The two signals f and f ′ of the second intermediate frequency which have become comparable are amplified by the amplifier 16 to a signal level suitable for the A / D converter 17, and the A / D converter 17
Converted to digital output at. In addition, the attenuation amount of the attenuator 13 is set so that the frequency converter 14 operates normally and A /
It is set in consideration of the amplification amount of the amplifier 16 so that the influence of the quantization noise generated by the analog-digital conversion in the D converter 17 is eliminated. The signal level at which the influence of the quantization noise disappears is such that the quantization noise decreases as the number of quantization steps increases (fine quantization is performed), and S / N of approximately 5 dB is obtained at 5 bits or more. Any level that can be quantized by

Based on the digital output from the A / D converter 17, the power calculation unit 23 causes the attenuation amount of the attenuator 13 and the coupling amount of the coupler 3 which is a circuit loss, the conversion loss of the frequency converter 14 and the bandpass filter 15. The transmission channel output power and the adjacent channel leakage power are calculated in consideration of the passage loss and the transmission path loss. Here, a specific method for calculating the power value from the digital output from the A / D converter 17 will be described. To describe. First, from the voltage value v (t) of the output of the A / D converter 17 and the measurement time Δt of the v (t), d in the following equation (1) is used.
B value can be calculated.

[0028]

[Equation 1]

Since the dB value is obtained from [Equation 1], a reference signal is input to the amplifier 16, a digital output is output from the A / D converter 17, and the power calculator 23 calculates the dB value. The dB value is used as a reference value. For example, the dB value calculated by [Equation 1] when a 0 dBm signal is input from the amplifier 16 is the reference value 1, and the value calculated by [Equation 1] when a -40 dBm signal is input is the reference value 2. As described above, the relationship between the absolute power value, which is measured and set in advance and input to the RAM 22 as a reference, and the reference value is stored as a table (hereinafter referred to as an absolute power reference value table). Then, the transmission channel output power and the adjacent channel leakage power are measured, the dB value is calculated from the measured v (t) by [Equation 1], and compared with the absolute power reference value table, and the absolute power is calculated from the deviation from the absolute power reference value table. You will be asked. Since the absolute power value of the digital output of the A / D converter 17 is obtained here, the absolute power value and the attenuator 1
The transmission channel output power and the adjacent channel leakage power can be calculated from the attenuation amount of 3 and the circuit loss. Since the transmission channel output power and the adjacent channel leakage power are calculated, the AC
The LR value is calculated from the following [Equation 2].

[0030]

[Equation 2]

Then, the calculation results are stored in the memory section 24 of the control section 21. The circuit loss is determined at the design stage of each circuit. The attenuation amount of the attenuator 13 is stored in the memory unit 24, and the circuit loss is the circuit loss.
Is previously written and stored in the RAM 22. On the other hand, in the RAM 22, the allowable value of the standard of the transmission channel output power and the allowable value of the ACLR standard, which will be described later, are written in advance in the RAM 22. Therefore, the allowable value of the transmission channel output power standard written in the RAM 22 is compared with the calculation result of the transmission channel output power stored in the memory unit 24, and the allowable value of the ACLR standard and the calculation result of the ACLR value are compared. The monitoring control unit 25 compares the calculated results with the voltage tolerance of the voltage generation source 12 depending on whether the calculation result satisfies the standard allowable value.
Is controlled by the transmission power control signal to change the power supply voltage and bias voltage supplied to the power amplifier 4, and the gain of the variable gain amplifier 5 is changed by the gain control signal.

Next, FIG. 5 is a control flow chart for keeping the output power of the transmission channel and the leakage power of the adjacent channel within the allowable values of the standard. In the case where the third local frequency of the third local oscillator 18 is set to Upper Local, the present invention will be described. Will be described more specifically by each step (S100 to S501 in the figure). The oscillation frequency of the third local oscillator 18 is set to the frequency F + f obtained by adding the second intermediate frequency f to the transmission channel signal F with respect to the transmission signal obtained by branching the transmission signal of the transmission unit 19 by the branching means such as a coupler (S100). ).

The attenuation amount of the variable attenuator 13 is increased and the attenuation amount is stored in the memory unit 24 (S101). The transmission channel signal included in the transmission signal and the third local oscillator 18
The frequency converter 14 for mixing with the signal of the third local frequency of 1 performs frequency conversion to obtain the second intermediate frequency f corresponding to the transmission channel signal F (S102).

The power of the second intermediate frequency f is digitally output by the A / D converter 17 (S103). The digital output is converted into electric power, and the electric power value obtained by the conversion is stored in the memory unit 2
In consideration of the circuit loss stored in the RAM 22 such as the attenuation amount of the attenuator 13 and the coupling amount of the coupler 3 stored in 4, the power calculation unit 23 calculates the transmission channel output power (S104).

Calculated transmission channel output power and RAM
The transmission channel output power written in No. 22 is compared with the standard allowable value (S105). When the calculated transmission channel output power is smaller than the allowable value of the standard, the gain of the variable gain amplifier 5 is increased by the gain control signal from the monitoring controller 25 of the controller 21 (S200).

The steps S100 to S105 are repeated until the calculated transmission channel output power falls within the standard allowable value (S201). When the calculated transmission channel output power is larger than the allowable value of the standard, the gain of the variable gain amplifier 5 is reduced by the gain control signal from the monitoring controller 25 of the controller 21 (S30).
0).

The steps S100 to S105 are repeated until the calculated transmission channel output power falls within the standard allowable value (S301). When the calculated transmission channel output power falls within the allowable value, the third local frequency of the third local oscillator 18 is the frequency obtained by adding the second intermediate frequency f to the adjacent channel signal F + ΔF (or F−ΔF). F + f + ΔF (or F + f-ΔF
(Not shown)) (S106).

The attenuation amount of the attenuator 13 is reduced and the attenuation amount is stored in the memory unit 24 (S107). The adjacent channel signal and the signal of the third local frequency from the third local oscillator 18 are mixed and frequency-converted by the frequency converter 14 to obtain the second intermediate frequency f'corresponding to the adjacent channel (S108).

The signal power of the second intermediate frequency f'is A / D
Digital output is performed by the converter 17 (S109). The digital output is converted into electric power, and the electric power value obtained by the conversion is added to the electric power calculation unit 23 in consideration of the circuit loss such as the attenuation amount of the attenuator 13 and the coupling amount of the coupler 3 stored in the memory unit 24. It is calculated as adjacent channel leakage power (S110).

The calculated value of the transmission channel output power and the calculated value of the adjacent channel leakage power are compared to calculate the ACLR value (S111). The calculated ACLR value is compared with the allowable value of the ACLR standard written in the RAM 22 (S1).
12). When the calculated ACLR value is larger than the allowable value of the ACLR standard written in the RAM 22 (large in absolute value), it is supplied from the voltage generation source 12 by the transmission power control signal from the monitoring controller 25 of the controller 21. A calculated by controlling the power supply voltage and bias voltage of the power amplifier 4
In order to keep the CLR value within the allowable value of the ACLR standard, the adjacent channel leakage power is controlled to increase (S400).

The above steps S100 to S112 and steps S200 to S201 or S300 to S30.
1 is repeated so that the calculated ACLR value falls within the allowable value of the ACLR standard (S401). Calculated AC
When the LR value is smaller than the allowable value of the ACLR standard (small in absolute value), the transmission power control signal from the monitoring control unit 25 of the control unit 21 causes the power supply voltage of the power amplifier 4 supplied from the voltage generation source 12 to be transmitted. The bias voltage is controlled so that the adjacent channel leakage power is reduced so that the calculated ACLR value falls within the allowable value of the ACLR standard (S500).

The above steps S100 to S112 and steps S200 to S201 or S300 to S30.
1 is repeated so that the calculated ACLR value falls within the allowable value of the ACLR standard (S501). Calculated AC
When the LR value falls within the allowable value of the ACLR standard, the control signal from the monitor control unit 25 of the control unit 21 causes the power supply voltage of the voltage generation source 12, the bias voltage, and the variable gain amplifier 5 to operate.
The gain is maintained constant (S113).

By the above steps, the output power of the transmission channel and the leakage power of the adjacent channel satisfy the allowable values of the standard, the transmission signal is optimized, and as a result, the wireless device operating with the optimum power efficiency is obtained. The control flow of FIG. 5 will be described more specifically with reference to FIGS. 6 to 8. 6 to 8, the dotted line is the maximum output standard of the output power of the transmission channel, and the upper and lower broken lines are the allowable values of the standard of the output power of the transmission channel defined by the present invention, which is a range narrower than the range of the standard defined by the technical standard or the like. Set to. Two-dot chain lines above and below this allowable value are the upper limit and the lower limit of the transmission channel output power standard defined by technical standards and the like. Further, the alternate long and short dash line is the standard of the adjacent channel leakage power defined by the technical standard when the transmission channel output power is set to the maximum output standard, that is, the ACLR standard, and is defined as the upper limit of the ACLR standard in the present invention.
Further, the broken line below the lower limit is the lower limit of the adjacent channel leakage power defined in the present invention, which is the lower limit of the ACLR standard in the present invention, and the part between the upper limit and the lower limit and including the upper limit and the lower limit is It is the allowable value of the ACLR standard defined by the invention.

Since the ACLR is a value determined by the difference between the output power of the transmission channel and the output power of the transmission channel as can be seen from the equation (2), in the adjustment setting of the output power of the transmission channel and the leakage power of the adjacent channel, for example, Is set to the upper limit of the transmission channel output power tolerance,
The upper limit value of the adjacent channel leakage power (corresponding to the ACLR standard defined in the technical standard) rises upward on the vertical axis of the figure, and conversely, when the transmission channel output power is set to the lower limit of the allowable value, The upper limit value of the channel leakage power falls below the position on the vertical axis of the figure.

FIG. 6 shows the input / output of the transmission channel output power and the adjacent channel leakage power of the power amplifier 4 with the power supply voltage Vd from the voltage generation source 12 and the bias voltage Vg as parameters to the amplification element such as the FET element of the power amplifier. Although it is a characteristic diagram, the vertical axis shows the output power value of the standard at the output specified point defined by the technical standard or the like. Further, in this figure, the power amplifier operates in the range of the power supply voltage Vd and the bias voltage of Vd1, Vg1 to Vdn, Vgn. From the perspective of this figure, when the input of the power amplifier 4 is changed while the parameters of the power supply voltage and the bias voltage are constant, the transmission channel output power and the adjacent channel leakage power are the transmission channel output power characteristic and the adjacent channel leakage, respectively. The power characteristics simultaneously change along the characteristic curve of the same parameter. For example, V as a parameter
When the input of the power amplifier 4 operating at d1 and Vg1 is changed, the transmission channel output power changes along the transmission channel output power characteristic curve of Vd1 and Vg1, and at the same time, the adjacent channel leakage power also becomes the adjacent channel of Vd1 and Vg1. It changes along with the transmission channel output power along the leakage power characteristic curve.

FIG. 7 is a diagram for explaining the order in which the transmission channel output power and the adjacent channel leakage power are adjusted to the allowable values of the respective standards after the power is turned on to the power amplifier, and a part of FIG. 6 is enlarged. There is. First, the monitor control unit 25 controls the voltage generation source 12 by the transmission power control signal and supplies the power supply voltage Vd from the voltage generation source 12 to the power amplifier 4.
The bias voltage Vg is set to Vd1 and Vg1, and then the gain control signal is controlled to increase the gain of the variable gain amplifier 5, the output of the variable gain amplifier 5, that is, the input of the power amplifier 4 is increased, and the power amplifier 4 is increased. The output of the variable gain amplifier 5 is increased until the output power level at the output power regulation point reaches the upper limit value of the allowable value of the standard of the transmission channel output power, that is, the input of the power amplifier 4 is changed to "a". This operation is performed so that the transmission channel output power reaches the upper limit “a” of the allowable value of the standard along the input / output characteristic A of the power supply voltage and bias voltage of the power amplifier 4 of Vd1 and Vg1. This means that it corresponds to steps (S100) to (S105) in the flow of FIG.

When the power is turned on, the power supply voltage and the bias voltage of the power amplifier are operated with the input / output characteristics that can always obtain characteristics close to linearity. This requires wireless devices to strictly comply with the standards specified in the wireless communication system to avoid interference with other wireless communication systems, so it is necessary to make marginal adjustments to the standard. Because it is.

Next, the adjacent channel leakage power is measured and calculated. This is steps S106 to S111 in the flow of FIG.
Equivalent to. The calculated value is the value of the point "a '" of the input / output characteristic A'of the adjacent channel leakage power, which is lower than the lower limit value of the adjacent channel leakage power (lower limit value of the allowable value of the ACLR standard). The bias voltage is controlled to increase the adjacent channel leakage power so that the adjacent channel leakage power reaches the lower limit value. This adjustment corresponds to the step (S400) in the flow of FIG. At this time, the adjacent channel leakage power is the point “b ′” on the input / output characteristic B ′ of the adjacent channel leakage power.
Move to the position. Next, the transmission channel output power is measured and calculated, and the transmission channel output power value is located at the point “b” on the input / output characteristic B of the transmission channel output power. This position is within the allowable value of the transmission channel output power standard. In the state of point “b”, both the transmission channel output power and the adjacent channel leakage power are within the allowable values of the respective standards, so that the wireless device satisfies the allowable values of the standards, and the adjustment is completed. However, in a normal radio device, it is required to set the maximum output standard as the output power of the transmission channel, and further adjustment is performed to achieve more optimal power efficiency operation.

That is, as the next step, the gain of the variable gain amplifier is increased, that is, the input of the power amplifier is increased, the output of the power amplifier is increased within the allowable value of the standard, and then the adjacent channel leakage power is measured. By repeating the process of controlling the power supply voltage and the bias voltage to increase the adjacent channel leakage power within the allowable value of the standard,
Output channel output power is the maximum output standard value, point "c" in the figure
The adjacent channel leakage power is made closer to the position of "c '" in the figure, at the position of the adjacent channel leakage power, the upper limit of the adjacent channel leakage power (the ACLR standard defined by technical standards, the upper limit of the allowable value of the ACLR standard defined by the present invention). The value is adjusted and set to a more optimum value, but at this time, the input of the power amplifier 4 is at the position of "c". This adjustment is performed in steps S100 to S1 of the flow of FIG.
12 and steps S200 to S201 and step S400
This corresponds to repeatedly executing S401 to S401.

FIG. 8 is a diagram for explaining the order of adjusting the transmission channel output power and the adjacent channel leakage power to the optimum values when an abnormality occurs and the transmission channel output power deviates from the standard allowable value, and is a part of FIG. Is expanding. The adjustment order will be described with reference to FIG. 8 in which the transmission channel output power is larger than the standard allowable value. Step (S100) of the flow in FIG.
As a result of measuring the transmission channel output power in (S104), it is assumed that the transmission channel power has the value of point "d" in FIG.

The point "d" is the transmission channel output power value on the input / output characteristic D of the transmission channel output power of the power amplifier 4 when the input level of the power amplifier 4 is the point "d"". The power amplifier 4 outputs the power value at the point “d ′” of the input / output characteristic D ′ of the adjacent channel leakage power as the adjacent channel leakage power. The calculated value and the allowable value of the transmission channel output power standard are compared, and as a result of the calculated transmission channel output power being large, the transmission channel output power of the power amplifier 4 is reduced to the maximum output standard by step S300 in the flow of FIG. Thus, the gain of the variable gain amplifier 5 is reduced, that is, the input power of the power amplifier 4 is reduced from the point "d" to the point "e".

By lowering the input level of the power amplifier 4 to "e", the output power of the transmission channel is changed to the input / output characteristic D.
The point is the position of the maximum output standard value of the point "e" along. Figure 5
In the step (S105) of the flow, the transmission channel output power is compared with the standard allowable value and is within the standard allowable value. Therefore, the next step is measurement of adjacent channel leakage power, calculation of ACLR value, ACLR Comparison with the allowable value of the standard, that is, step (S106) of the flow of FIG.
(S112) is performed.

In the figure, the adjacent channel leakage power value is the value at the point "e '" of the input / output characteristic D'of the adjacent channel leakage power. The point of adjacent channel leakage power value "e '" is ACLR.
5 is within the permissible value of the standard, but the step of the flow of FIG. 5 is performed so as to be close to the upper limit value of the ACLR standard (S400).
Then, the voltage generator 12 is controlled to adjust the power supply voltage Vd and the bias voltage Vg.

Vd and Vg are adjusted. Here, for example, Vd is changed so that the adjacent channel leakage power becomes the upper limit value of the adjacent channel leakage power standard (the upper limit value of the allowable value of the ACLR standard). The voltage Vd is adjusted. The adjacent channel leakage power at this time is the point "f '" in the figure. Although the power supply voltage Vd is changed in the above-described example, the bias voltage Vg may be changed, or both the power supply voltage Vd and the bias voltage Vg may be changed. The relationship between the power supply voltage Vd, the bias voltage Vg, and the adjacent channel leakage power is stored in the RAM 22 as measurement data in advance,
You may set Vd and Vg from the data.

Now, as a result of controlling the voltage generation source 12 in step S400 of the flow of FIG. 5, the transmission channel output power and the adjacent channel leakage power value are "f",
Move to the "f '" point. Next, the flow for measuring the output power of the transmission channel is moved to, and the output power of the transmission channel is measured and compared with the allowable value of the standard. This operation is performed in steps S100 to S105.
Hit The transmission channel output power at the point “f” in FIG. 8 is measured, but the transmission channel output power is smaller than the standard allowable value as compared with the standard allowable value of the transmission channel output power. 5, the process proceeds to step S200 of the flow of FIG. 5 to increase the gain of the variable gain amplifier 5, that is, to change the input level of the power amplifier 4 from the point “f” ”(=“ e ””) to the point “g” ”. The transmission channel output power of the power amplifier 4 is increased to match the maximum output standard of the standard at the specified point of the standard, which is set to the point "g" on the input / output characteristic E of the transmission channel power of FIG. It

Next, the process moves to steps S106 to S111 of the flow of FIG. 5 of the adjacent channel leakage power measurement flow, the adjacent channel power is measured, and A is calculated from the transmission channel output power.
Calculate the CLR value. The adjacent channel leakage power value is shown in FIG.
Since the calculated ACLR value is smaller than the allowable value of the ACLR standard, the adjacent channel leakage power value is set to the upper limit of the allowable value of the ACLR standard. To get closer (S500)
The power supply voltage Vd is adjusted by setting the adjacent channel leakage power value to "h '" which is a position near the upper limit. At this point, the transmission channel output power and the adjacent channel leakage power move to input / output curves F and F ′, respectively.

Next, the transmission channel output power measurement flow,
The process proceeds to steps S100 to S105 in the flow of FIG. 5 and the transmission channel output power is measured and compared with the standard allowable value. The output power of the transmission channel is within the allowable value of the standard in terms of "h" but is set to the maximum output standard. Therefore, the gain of the variable gain amplifier 5 is reduced in step S300 of the flow of FIG. Is lowered from "h" to "i", and the transmission channel output power is adjusted to the maximum output standard within the allowable value of the standard. This is the point "i" in FIG. Next, the process proceeds to steps S106 to S112 in the flow of FIG. 5 to measure the adjacent channel leakage power, calculate the ACLR, A
Compare with the allowable value of CLR standard. As can be seen from FIG. 8, this is the point of “i ′” on the adjacent channel leakage power input / output characteristic F ′, and at this stage, the ACLR value can be set near the upper limit value of the standard allowable value. 5, the power supply voltage from the voltage generation source, the bias voltage, and the gain of the gain variable amplifier are held constant, and the series of adjustment flows is completed. In this adjustment example when an abnormality occurs, the transmission channel output power is adjusted to the maximum output standard, and the adjacent channel leakage power is also adjusted to the upper limit value of the allowable value of the ACLR standard. Wireless devices have been obtained that operate at near-ideal and most optimal power efficiency that is satisfactory.

Although two examples of adjusting the transmission channel output power and the adjacent channel leakage power to the standard allowable values have been described above with reference to FIGS. 7 and 8, it goes without saying that the same adjustment can be made in cases other than this example. In addition, the adjustment method that allows the wireless device to operate with more optimal power efficiency by setting the allowable value in the standard of the wireless communication system for the output channel output power and the adjacent channel leakage power standard is described. The allowable value range of the standard of the invention is set to the range of the conventional standard defined in the technical standard of the wireless communication system for the transmission channel output power, and the lower limit value of the standard of the present invention is set for the adjacent channel leakage power to the wireless communication. It can be easily understood that the present invention can be applied by setting the conventional standard defined in the technical standard of the system.

The above flow is periodically executed by the supervisory control unit 25 of the control unit 21 and is controlled so that the transmission device is always maintained in the optimum operating state. (Supplementary Note 1) In a radio device that transmits a plurality of transmission signals using a plurality of radio frequency transmission channels, an amplification unit that amplifies the transmission signals, and a power value of the transmission signals of a predetermined radio frequency transmission channel and an adjacent radio frequency channel 2. A wireless device, comprising: a measuring unit that measures the leakage power value of the device; and a control unit that controls the amplifying unit according to each measured power value.

(Supplementary Note 2) In a radio apparatus for transmitting a plurality of transmission signals using a plurality of radio frequency transmission channels, amplification means for amplifying the transmission signals, power value of the transmission signals of a predetermined radio frequency transmission channel, and adjacency Measuring means for measuring the leakage power value to the radio frequency channel, calculating ACLR (adjacent channel leakage power ratio) from each measured power value, and controlling the amplifying means so as to reduce the difference from the desired ACLR. A wireless device comprising: a control unit.

(Supplementary Note 3) In a radio apparatus for transmitting a plurality of transmission signals using a plurality of radio frequency transmission channels, the power value of the transmission signal of a predetermined radio frequency transmission channel and the leakage power value to an adjacent radio frequency channel are A measuring unit for measuring, an amplifying unit for amplifying a transmission signal, and an ACLR (adjacent channel leakage power ratio) are calculated from each measured power value so that the calculated power value falls within a desired ACLR allowable value. And a control unit that controls the amplification unit.

(Supplementary Note 4) In a radio device used in a radio system for communicating via one or more radio frequency transmission channels, an amplification means for amplifying the transmission signal and the power of the transmission signal of a predetermined radio frequency transmission channel. And a control means for controlling the amplification means according to each measured power value, and a measuring means for measuring a value and a leakage power value to an adjacent radio frequency channel.

(Supplementary Note 5) The control means controls the amplifying means so that the power value of the transmission signal is within a desired transmission power allowable value, and at the same time, based on the power value and the leakage power value of the transmission signal. 5. The wireless device according to appendix 1 or 4, wherein the amplifying means is controlled so that the obtained ACLR falls within a desired ACLR allowable value. (Supplementary Note 6) The control unit controls the amplification unit so as to reduce the difference between the power value of the transmission signal and the desired transmission power value, and is determined from the power value and the leakage power value of the transmission signal. 5. The wireless device according to appendix 1 or 4, wherein the amplifying means is controlled so that a difference between the ACLR and a desired ACLR value is reduced.

(Supplementary Note 7) In a transmission power control method in a radio device used in a radio system for communicating via one or more radio frequency transmission channels, the power value of a transmission signal of a predetermined radio frequency transmission channel and an adjacent radio A transmission power control method for measuring a leakage power value to a frequency channel and controlling an amplifying means according to each measured power value.

(Supplementary Note 8) The control means obtains A so that the power value of the transmission signal is within a desired transmission power allowable value and is obtained from the power value and the leakage power value of the transmission signal.
5. The wireless device according to appendix 1 or 4, wherein the amplifying means is controlled so that the CLR falls within a desired ACLR allowable value. (Supplementary Note 9) The control unit reduces the difference between the power value of the transmission signal and the desired transmission power value, and the ACLR and the desired ACLR value obtained from the power value and the leakage power value of the transmission signal. 5. The wireless device as set forth in appendix 1 or 4, wherein the amplifying means is controlled so that the difference between

(Additional remark 10) The measuring means converts the analog signal branched from the transmission signal into a digital signal by the analog / digital converting means, and measures the power from the digital signal. The wireless device according to any one of claims. (Supplementary note 11) The radio apparatus according to supplementary note 10, further comprising: a unit that adjusts an input signal level of the analog / digital conversion unit so as to reduce generation of quantization noise.

(Supplementary Note 12) The amplifying means includes power amplifying means and level varying means for varying the input level to the power amplifying means, and the control means includes the power amplifying means supply voltage and the gain of the level varying means. 10. The wireless device according to any one of appendices 1 to 9, characterized in that the wireless device is controlled. (Supplementary Note 13) The control unit controls the gain of the level varying unit according to the measured power value of the transmission signal, and controls the supply voltage to the power amplifying unit according to the leakage power value to the adjacent channel. 13. The wireless device according to appendix 12, which is controlled.

(Supplementary Note 14) The measuring means receives a part of the transmission signal, converts the signal of the desired frequency transmission channel and the signal of the adjacent channel into the same intermediate frequency signal, and converts each power from the converted signal. The wireless device according to any one of appendices 1 to 4, which measures a value.

[0069]

As described above, in the wireless device of the present invention, the output power of the transmission channel and the leakage power of the adjacent channel are within the allowable values of the respective standards, and a power amplifier that operates with good power efficiency can be obtained. It enables a wireless device that operates in an optimal state. Furthermore, in a wireless communication system in which a plurality of wireless communication systems coexist, the wireless device of the present invention can adjust the adjacent channel leakage power up to the limit value of the standard and does not depend on the transmission / reception method.
The present invention enables the construction of various wireless communication systems that can be used in various wireless communication systems such as the FDM system, the FDMA system, and the CDMA system, and that can use frequencies efficiently, and that have good power efficiency and are economical. In addition, the above-mentioned standard includes not only the standard defined as the technical standard of the wireless communication system but also the standard defined separately from the technical standard. Further, the size of the allowable value can be set to a value narrowed to a limit determined by the accuracy of the power calculation unit in the wireless device, the power supply voltage, the control accuracy of the bias voltage, the accuracy of the A / D converter, and the like. Also, ACL
Since the upper limit value of the standard of the R value is determined on the basis of the transmission channel output power value, the upper limit value of the adjacent channel leakage power is automatically determined when the transmission channel output power is set.

As described above, according to the present invention, the transmission channel output power and the ACLR value can be measured and calculated, and these values can be set within the allowable values of the standard. Since the adjacent channel leakage power can be adjusted to the standard allowable value by satisfying the allowable value, a wireless device that operates with optimum power efficiency can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a digital mobile phone which is an embodiment according to the present invention.

FIG. 2 shows an attenuator input signal spectrum and a third local oscillation frequency.

FIG. 3 is an input signal spectrum of the A / D converter (No. 1).

FIG. 4 is an input signal spectrum of the A / D converter (No. 2).

FIG. 5 is a control flowchart of transmission channel output power and adjacent channel leakage power.

FIG. 6 shows input / output characteristics of transmission channel output power and adjacent channel leakage power.

FIG. 7 shows the order of adjusting the transmission channel output power and the adjacent channel leakage power to the optimum values when the power is turned on.

FIG. 8 shows the order of adjusting the transmission channel output power and the adjacent channel leakage power to the optimum values when an abnormality occurs.

[Explanation of symbols]

1 antenna 2 Duplexer 3 coupler 4 power amplifier 5 variable gain amplifier 6 band pass filter 7 Frequency converter 8 band pass filter 9 modulator 10 Second local oscillator 11 First local oscillator 12 Voltage source 13 attenuator 14 Frequency converter 15 band pass filter 16 amplifier 17 A / D converter 18 Third local oscillator 19 Transmitter 20 Receiver 21 Control unit 22 RAM 23 Power calculator 24 memory 25 Monitoring and control unit 26 external terminals

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 5K004 AA01 BA02 BB02 BB04 BB06                       BC00                 5K011 DA12 EA03 GA05 JA01                 5K060 BB05 CC04 CC12 DD04 HH05                       HH06 HH09 LL01                 5K067 AA03 BB04 CC02 CC04 CC10                       EE02 FF02 GG08 HH23 KK15

Claims (5)

[Claims] 1. In a radio apparatus for transmitting a plurality of transmission signals using a plurality of radio frequency transmission channels, an amplification means for amplifying the transmission signals, a power value of the transmission signals of a predetermined radio frequency transmission channel, and an adjacent radio frequency channel. A radio apparatus comprising: a unit for measuring a leakage power value to the radio unit; and a control unit for controlling the amplifying unit according to each measured power value. 2. A radio apparatus for transmitting a plurality of transmission signals using a plurality of radio frequency transmission channels, amplifying means for amplifying the transmission signals, power values of the transmission signals of a predetermined radio frequency transmission channel, and adjacent radio frequencies. A means for measuring the leakage power value to the channel and an AC from each measured power value.
LR (Adjacent Channel Leakage Power Ratio) is calculated and the desired AC
And a control means for controlling the amplification means so as to reduce the difference from the LR. 3. A radio apparatus for transmitting a plurality of transmission signals using a plurality of radio frequency transmission channels, the power value of the transmission signal of a predetermined radio frequency transmission channel and the leakage power value to an adjacent radio frequency channel are measured. Means, an amplifying means for amplifying a transmission signal, and an AC from each measured power value.
LR (Adjacent Channel Leakage Power Ratio) is calculated and the desired AC
A wireless device, comprising: a control unit that controls the amplification unit so that the calculated power value falls within an LR allowable value. 4. A radio device used in a radio system for communicating via one or more radio frequency transmission channels, an amplification means for amplifying a transmission signal, a power value of the transmission signal of a predetermined radio frequency transmission channel, and A radio apparatus comprising: a measuring unit that measures a leakage power value to an adjacent radio frequency channel; and a control unit that controls the amplifying unit according to each measured power value. 5. The control means controls the amplifying means so that the power value of the transmission signal is within a desired transmission power allowable value, and an ACLR obtained from the power value and the leakage power value of the transmission signal. 5. The wireless device according to claim 1, wherein the amplifying means is controlled so that is within a desired ACLR allowable value.